DS2480B+T&R

The DS2480B+T&R is a serial to 1-wire line driver in 8 pin NSOIC package. This interface chip supports standard and overdrive speeds, it connects directly to UARTs and 5V RS232 systems. Interfacing to RS232C (±12V levels) requires a passive clamping circuit and one 5V to ±12V level translator. Internal timers relieve host of burden of generating the time-critical 1-wire communication waveforms. The device can translate each character into eight 1-wire time slots thereby increasing data throughput significantly. It can be set to communicate at four different data rates, including 115.2Kbps, 57.6Kbps and 19.2Kbps with 9.6Kbps being the power-on default. This IC uses a unique protocol that merges data and control information without requiring control pins. This approach maintains compatibility to off the shelf serial to wireless converters, it allows easy realization of 1-wire media jumpers.

• Supply voltage range is 4.5V to 5.5V, operating temperature range from -40°C to 85°C
• Simplifies the design of a low-cost, universal RS232 COM Port to 1-wire interface true ground
• Interface to an RS-232 COM port for reading and writing 1-wire devices
• Works with bipolar as well as unipolar logic signals
• Slew rate controlled 1-wire pull down & active pull-up to accommodate long lines & reduce radiation
• Self-calibrating time base with ±5% tolerance for serial and 1-wire communication
• Compatible with optical, IR and RF to RS232 converters
• Single product supports various iButton or 1-wire device types for easy system integration

Applications

Communications & Networking

Warnings

Market demand for this product has caused an extension in leadtimes. Delivery dates may fluctuate. Product exempt from discounts.

Notes

ADI products are only authorized (and sold) for use by the customer and are not to be resold or otherwise passed on to any third party